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Finding the Fourth Proportional to 429,404.40, 644,106.60 and 303,433.20

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Solution

The fourth proportional to 429,404.40, 644,106.60 and 303,433.20 is: 455,149.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,404.40 : 644,106.60 = 303,433.20 : x
  2. Step 2: Convert to fraction form
    429,404.40/644,106.60 = 303,433.20/x
  3. Step 3: Cross multiply
    429,404.40x = 644,106.60 × 303,433.20
  4. Step 4: Simplify right side
    429,404.40x = 195,443,326,779.12
  5. Step 5: Solve for x
    x = 195,443,326,779.12/429,404.40
  6. Step 6: Final answer
    x = 455,149.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.